virulence 中文意思是什麼

Screening of hypo virulence of colletotrichum gloeosporioides and its control effect on apple anthracnose

蘋果炭疽菌低毒性菌株的篩選及控病效果

Type 1 pili is the important virulence factors on the e. coli in fection in chicken. through the adhering of pili, e. coli adhered on the epidermic cell of aspiratory tract, which was the first step of invading in host

1型菌毛是雞源致病性大腸桿菌的重要毒力因子，在致病過程中介導細菌吸附於雞呼吸道粘膜上皮細胞完成入侵的第一步。

Infectivity and virulence of millet culture. the 7 - day - old broomcorn millet culture was bioassayed against m. persicae nymphs by exposing aphids to conidial showers at 9 different concentrations ( 0. 4 - 50. 1 conidia / mm2 )

由此可見，在所測試的因素中，濕度和溫度對黍米培養物產抱的影響最為明顯，而光照影響較小。

In trpsin tolerance assay. this virus could resist to 1 % trpsis at 37 in an hour. in acid tolerance assay, this virus was resistant to ph3. 0 and ph5. 0 at 37 in 2 hours, and the average infection litre of the virus decreased little. in heat assay, at 50, the virus was processed from 5 minutes to 150 minutes and at each condition the viral virulence reduced to some certain degree. among these conditions, when at 50 in 30 minutes. the average infection litre of this virus decreased over 2 tilre. and when al 50 in an hour, cpe of ihis virus disappeared. when time was set for an hour. but with processed in different temperature as 50 60 70, 80, the virus losl the multiplication capacity complelely. in biological assay, we selected different cell lines to cultivate this virus by laking advantage of possesional cells at that time in our laboratory. then we found that fcwf cell line was the most sensitive to dxmv and mdck was the second. with f81 cell line, after passaged for 12 times continuously with low concentration of fcs. the virus could produce cpe. however, with vero cell line. the virus could not procuce any cpe after many passages. the hemagglutination and lumadsorption reaction test proved that this virus had no any reaction to erythrocyte of pig, fowl and cavy. by neutrolizaion assay, dxmv could be identified as a kind of ccv

理化學研究表明，該病毒為rna病毒，對氯仿、乙醚敏感；胰酶試驗中，經37 、 1小時處理的病毒，仍然能夠在貓源細胞fcwf細胞上生長，並且毒力基本保持不變；耐酸性試驗中，病毒分別在ph5 . 0和ph3 . 0經37作用2小時，毒力僅下降一個滴度；耐熱性試驗中，該病毒在恆定溫度50 ，設定不同時間，從5分鐘到150分鐘，毒力均有不同程度下降，其中， 50作用30分鐘，病毒平均滴度下降2個單位； 50 ， 60分鐘， cpe消失；恆定時間1小時，設定不同溫度（ 50 - 60 - 70 - 80 ） ，病毒在細胞上完全喪失增殖能力， cpe消失。生物學試驗，利用實驗室現有條件，選擇不同的細胞系對該病毒進行培養，發現該病毒對貓源細胞fcwf最敏感； mdck細胞次之； f81細胞經多次傳代，亦可出現cpe ；而vero細胞則不敏感。血凝試驗表明，該病毒對豬、雞、人及豚鼠的紅細胞均無血凝性。

The actue virulence of cumin seed oil and protective effects on the experimental gastric ulcer

孜然揮發油的急性毒性及對實驗性胃潰瘍的作用研究

Host resistance and fungal virulence parallel each other in the cross.

寄生的抗病性的病原菌的毒力在雜交中是勢均力敵的。

Virulence factors of helicobacter pylori in patients with chronic gastritis, intestinal metaplasia or gastric cancer

幽門螺桿菌毒素與胃黏膜腸上皮化生和胃癌

Virulence factor of the streptococcus suis type

2型豬鏈球菌毒力因子

The suddenness and the virulence of the exclamation startled martin

他忍俊不禁，更加不喜歡那人了。

Advance in virulence difforentiation of xanthomonas oryzae pv. oryzicola

水稻條斑病菌致病力分化研究進展

Detection of a new virulence associated gene in streptococcus suis type 2 jiangsu isolate

雞生長軸相關基因的研究進展

Comparisons of virulence of vibrions isolated from both diseased and healthy postlarvae of abalone

患病與健康雜色鮑苗中弧菌胞外產物的比較分析

Epidemiological study of streptococcus pneumoniae infection and the development of virulence factors

肺炎鏈球菌感染的流行病學及毒力因子研究進展

However, there would be difference in virulence among the strains of the same or different species

首先，將這8株細菌人工感染健康小鼠、鯽魚和鱉。

To dress the question if other virulence gene were present in this kind of strains, 152 of 436 irp2 - hybridized strains were re - confirmed and selected for this study. the virulence genes or putative virulence genes detected by pcr or hybridization include heat stable toxin ( st ) & heat labile toxin ( lt ) for enterotoxigenic e. coli ( etec ), invasive plasmid antigen b ( ipab ) for enteroinvasive e. coli ( eiec ), epec adherence factor ( eaf ), epec secretion protein c ( espc ) for enteropathogenic e. coli ( epec ), hemolysin ( hlya ) and shiga toxins ( sltl and slt2 ) for enterohaemorrhagic e. coli ( ehec ) and eaggec probe for entero - aggregative e. coli ( eaggec ). the prra and yc73 genes of pathogenicity associated island ( pai ) of urepathogenic e. coli ( upec ) and " o " island 28 ( rtx 615 ) gene was also detected, the later was a newly discovered putative pathogenicity island in e. coli o157 : h7

為探討攜帶小腸結腸炎耶爾森氏菌的hpi毒力島的大腸桿菌是否具有其他已知的毒力基因，選取82株由原位雜交和pcr方法初篩irp2陽性的大腸桿菌菌株，進行在致瀉性大腸桿菌的25個毒力基因的檢測，包括腸產毒性大腸桿菌的熱穩定毒素st和熱不穩定毒素lt ，腸侵襲性大腸桿菌的侵襲蛋白b基因ipab ，腸致病性大腸桿菌的eaf 、 espc基因，腸出血性大腸桿菌的溶血素hly 、志賀毒素1 （ slt1 ） 、志賀毒素2 （ slt2 ）基因，腸集聚性大腸桿菌的eaggec探針，以及在泌尿道致病性大腸桿菌和o157 ： h7大腸桿菌中新發現的毒力島基因。

Association between helicobacter pylori virulence and duodenal ulcer disease in patients from hong kong in china

中國香港地區幽門螺桿菌毒力基因型與十二指腸潰瘍關系的研究

The result shows that a vvibdv strain was obtained, the above work lay a important role for further studying on the molecular biological mechanism of antigenic drift and virulence variation of ibdv, molecular epedimiology, it also provided the basis for recombinant and gene deleted vaccine of ibdv

本實驗可以幫助我們進一步探討ibdv抗原性漂移和毒力變化的分子生物學機制，追溯ibdv的起源，理解病毒的傳播方式。同時也為研製開發基因重組疫苗和缺失疫苗打下一定的基礎。

The present study was aimed to develop a solid - culture - based technology for easy and cheap propagation of p. delphacis f95129 inocula using small grains as substrate for fungal growth. sporulation capacity and timing pattern were relied upon to evaluate culture quality and identify potential factors to affect the quality. infectivity or virulence of inocula derived from the culture was assayed against the green peach aphid, myzus persicae ( sulzer ), based on time - dose - mortality modeling

針對這一普遍性的技術難題，本研究以飛虱蟲癘霉f95129菌株為對象，以黍米、粟米為基本材料，探索建立簡便易行的侵染體繁殖技術體系，並對培養物進行了產孢潛能及其影響因子的評價以及針對桃蚜（ myzuspersicae （ sulzer ） ）的侵染性測定和時間?劑量?死亡率模型模擬。

Result competence can be induced in vitro and the expressing level of three virulence, lyta, nana, hyl, are higher in wild type than in the come mutant

另外還作了comc的表達測定，從基因水平確定感受態的發生。結果s pn在自然條件下轉化時，培養后吸光度到0

The result showed vp2 hydrophilic region and antigen variant and virulence of ibdv had very affinity

該結果表明， vp2與ibdv毒株的毒力強弱和抗原變異有密切的關系。